Benjamin Marauder .25 trasnfer port material i7

Has anyone used ptfe teflon rod for their trasnfer port in a marauder? I'm building a high power marauder .25 soon and plan on making the barrel port and valve port 0.220. And planned on using 1/4 od 0.250 teflon rod with the id drilled out to 0.220 to match the valve and barrel.
I cannot speak for one well known supplier of fine M-Rod parts but I think they are using the Teflon rod machined and bored as a TP.
 
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